Kikusui. Although technically they are the Doitsu version of Hariwake, scaleless white koi with patterns of orange or yellow are commonly referred to as Kikusui. The bright, metallic colors of Hariwake are also present in Kikusui. Tancho Kikusui are the sole variation of Kikusui.
Kikokuryu are scaleless (doitsu) koi with a white base combined with areas of black inside the single row of scales, along the back outside of the row, and on on the head around the eyes and nose. Kikokuryu are commonly thought to be metallic versions of Kumonryu.
Kin Kikokuryu combine orange or yellow with the black and white patterns of Kikokuryu to form the newest variety of koi in the industry.